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Linbo-Wang.PNGLinbo Wang, Ph.D.
Associate Professor
Department of Statistical Sciences and Department of Computer and Mathematical Sciences, University of Toronto

“Sparse Causal Learning”

In many observational studies, researchers are interested in studying the effects of multiple exposures on the same outcome. Unmeasured confounding is a key challenge in these studies as it may bias the causal effect estimate. To mitigate the confounding bias, we introduce a novel device, called the synthetic instrument, to leverage the information contained in multiple exposures for causal effect identification and estimation. We show that under linear structural equation models, the problem of causal effect estimation can be formulated as an $\ell_0$-penalization problem, and hence can be solved efficiently using off-the-shelf software. Simulations show that our approach outperforms state-of-art methods in both low-dimensional and high-dimensional settings. We further illustrate our method using a mouse obesity dataset.


Dr. Wang is an assistant professor in the Department of Statistical Sciences and the Department of Computer
and Mathematical Sciences, University of Toronto. He is also a faculty affiliate at the Vector Institute, a CANSSI
Ontario STAGE program mentor, and an Affiliate Assistant Professor in the Department of Statistics, University of
Washington, and Department of Computer Science, University of Toronto. Before these roles, Wang was a postdoc
at Harvard T.H. Chan School of Public Health. He obtained his Ph.D. from the University of Washington. His
research interest is centered around causality and its interaction with statistics and machine learning.

Sparse Causal Learning

Start Date & Time

April 05, 2024 02:00 PM - 03:00 PM



BB 1.01.20L


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